2 Questions Please help

Part I. The Williams' article provides results for two studies examining two hypotheses about conditioned reinforcement. Briefly describe the results of these studies. Using the information provided in both the readings and videos of this unit, provide an alternative explanation of these results.

Part II. In the SQAB preeminent Tutorial: Conditioned Reinforcement video, Tim Shahan talks about various choice models. Explain what choice models have to do with conditioned reinforcement, and how these models can enhance our understanding of conditioned reinforcement. Use a specific model as an example if it will help clarify your analysis.